Lathe appliance.



PATBNTBD AUG. zo. '1907.

3 SHEETS-BISET 1.

iA. T. ANDERSON. VLA'IHE APPLIANGE, APPLIOATIO'N FILED in 23. loe.

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PATENTED AUG. 20, 1907. A. T. ANDERSON. Y

LATHB APPLIANGB.

4APPLIQATION.mm1) nu as. .1906.

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No. 363,575. PATENTED AUG. 2o, 1907. A. T. ANDERSON.

'LATHB APPLIANGE. APPLIOATION FILED KAY 23.1906.

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TH: Nalmls PETERS co., wAsHmGmN. D. c,

A described in my of the base plate.

4 on the underside of the ALFRED T. ANDERSON,

PATENT OFFICE..

OF ST. LOUIS, MISSOURI.

LATHE APPLIANCE.

Specification of Letters Patent. Application led May 23,1906.

Patented Aug. 20, 190'?. Serial No. 318,372.

To all whom it may concern: n f Be it known that I, ALFRED T. ANDERSON,a citizen of the United States, residing at St. Louis, in the county iof St. Louis and State of Missouri, have invented new and usefulImprovements in Lathe Appliances, of which the following is aspecification.

This invention (which is an improvement upon that Patent No. 791,394,granted May 30, 1905) relates to lathe appliances, and has specialreference to center drills or grinders, the lobject being to provide asimple device by the use of which the drill or grinding or polishingdisk may be easily adjusted to work at any desired height or angle.

The object is attained in the mechanism illustrated In the accompanyingdrawings, Figure l is a front elevation of the device applied toa lathe.Fig. 2 is an end elevation of the same. Fig. 3 is a side view of thedevice partly in section.' Fig. i is a plan view. Figs. 5 and G are,respectively, a plan and a sectional view Similar numerals of referenceindicate similar parts in the respective gures.

In ,carrying out my invention I employ a'base-plate l, adapted to reston the carriage 2 of a lathe and which is provided with a centralopening 3 that registers with the T-slot in the carriage when the deviceis in its operative position, and also with a guide or truing flangebase plate in position to bear against the side of the lathe carriage 2to square or true the base plate and the parts carried thereby with thespindle of the lathe, or the article to be operated on by the appliance.

Fitted in the opening 3 is a post 5, preferably cylindrical in shape,rising from a disk 6, the two parts being adapted to slide in the usualT-slot 7 on the top of the carriage. The upper portion of the post 5 isinternally threaded, as shown at 8, and is engaged by a clampingscrew10, which passes up through the opening 3 in the base-plate and isprovided with an annular rib or shoulder l1 bearing upon a washer 12which rests upon the base-plate and extends over the central openingtherein, as clearly shown. The upper end of this clamping-screw isangular, so that it may be engaged by a wrench or key.

When the device is to be secured in position, the post is slippedlaterally through the end of the T-slot in the lathe-carriage, with thedisk 6 tting in the hori Zontal portion of the said slot and thebase-plate resting on the upper side ofthe carriage. The screw 10 isthen rotated, so as to carry the washer 12 downward against thebase-plate, and consequently to clamp the baseplate to the carriage.

In its upper side the base-plate is provided with an annular groove 15,in which is litted a ring 16, having a series of graduations 17 on itsupper side which facilitate an accurate adjustment of the device to workat any desired angle by moving past or registering with an index orpointer 18, marked on the upper surface of the baseplatef The ring issecured in its adjusted position by a set-screw 19, mounted in thebase-plate and passing through a slot 20, formed in the ringconcentrically with the sides of the same. The upper portion of thescrew bears upon the top of the ring, so as to bind it upon thebase-plate, as will be understood. Rising from and integral with thering 16 and on the opposite side of its center from the graduations 17and the slot 20 is a beam 2l, which extends horizontally beyond the edgeof the ring and is provided with a dovetailed horizontal groove 22 inone side. Mounted in this beam is a vertical shaft 23, carrying ahand-wheel on its upper end and a pinion 24 near its lower end. Thepinion 24 meshes with a rack-bar 25, formed on the dovetailed rib 2G,constituting the back of a bracket which supports the casting withinwhich the drill or grinder is mounted. The dovetailed rib iits in thedovetailed groove 22 and the main portion of the bracket extendsdownward and outward therefrom in a curved arm 27, upon which thecasting or casing 28 is secured. The casing 28 is a hollow cylindricalcasting having an eccentric rib 29 on one side which tits in a groove29*1 in the upper surface of the supporting-arm 27, and is provided witha T- shaped slot 30, adapted to engage the shank and head curvedsupporting-arm and carries a clamping-nut 32 on its lower end which isadapted to be tuined up against the underside of the said arm to securethe casing at any desired point. The tool-carrying shalt is mountedcentrally within the casing or casting 28 and forms the armature of anelectric motor secured therein. On the end of the shaft beyond the endof the casing is secured a drill,a cutter, an emery disk, or other toolaccording to the work to be accomplished.

By the use of the guide or truing iiange 4 forming a part ofthe baseplate l, I render unnecessary the lateral clamping device shown in mysaid former patent as associated with the post 3, which device involvesthe employment of clamping jaws adapted to be forced outward against thesides of the T-slot by means of the feeding screws 7. In my said patentthe object of this clamping device is to securely hold the base plate inits proper position or in parallelism with respect to the carriage, andthis same result is effected under my present improvement by the simpleexpedienY of combining with the carriage a base plate having in itself atruing guide or ange, and employing with such plate only verticalclamping means.

I do not restrict myself to the exact rdetails of construction,combination, and arrangement herein set l'orth, it being obvious thatininor variations thereof not involvingl the exercise oi invention maybe ina-de by the skilled mechanic7 and such departures lroin what isherein described and claimed not involving invention I consider aswithin the scope and ternis of niy claims. Y Having thus described myinvention7 I clain1z The combination in a lathe appliance of a carriagehavinel a T-slot; a base plate having, therethrough a central openingand furnished on its upper face with a concentric groove, the latter toreceive adjustable operative parts, and on its under side with a lateralguide or truing ilange parallel to and in Contact with a side of thecarriage; a post itting, in the central opening of the base plate andprovided with a lowerl disk, said post iittingthe T-slot of thecarriage, and means for vertically clamping said post and thereby thebase plate to the carriage, suhstantally as set forth.

In testimony whereof I afix my signature in presence of two witnesses.

ALFRED T. ANDERSON.

Witnesses CLARENCE J. ANDERSON, JNO. W. BRANDON.

